Across
- 1. Cavity a cavity that filters, warms, and humidifies air before it continues in the respiratory system
- 6. biological molecules responsible for the thousands of chemical inter-conversions that sustain life
- 7. diffusion with water only
- 8. crushes food and mixes it with saliva
- 9. Muscle tissue located underneath the lungs
- 10. a group of naturally occurring molecules that include fats, waxes, sterols, and vitamins
- 12. carries food from the pharynx to the stomach
- 13. branches that bring air into the inner part of the lungs
Down
- 2. sacs in the lungs that exchange oxygen for carbon dioxide
- 3. a type of membrane that lines the interior of the digestive system
- 4. Respiration chemical reactions that release energy from food
- 5. first 25 centimeters of the small intestine
- 9. the movement of substances from an area of high concentration to an area of low concentration
- 11. starts to break proteins down in the stomach